What Is This Tool?
This online converter changes luminance measurements from stilb (sb), a CGS photometric unit, into millilambert (mL), a non‑SI unit used in imaging and cinematography. It helps transform legacy or historical photometric values into units adapted for modern applications.
How to Use This Tool?
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Enter the luminance value measured in stilb [sb]
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Select stilb as the source unit and millilambert as the target unit
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Click the convert button to get the value in millilambert [mL]
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Use the results to analyze or compare luminance in relevant applications
Key Features
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Converts luminance values from stilb to millilambert using established conversion rates
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Supports interpretation of historical CGS-based luminance data
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Useful for optical research, broadcast engineering, and imaging laboratories
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Browser-based and easy to use with no installation required
Examples
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Convert 1 stilb to millilambert: 1 sb = 3141.59 mL
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Convert 0.5 stilb to millilambert: 0.5 sb = 1570.80 mL
Common Use Cases
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Translating historical photometric results recorded in CGS units to modern SI-compatible units
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Specifying luminance for display screens and projectors in cinematography and broadcast
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Characterizing output luminance in photographic labs and imaging research
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Calibrating instruments by converting obsolete units to contemporary measurements
Tips & Best Practices
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Ensure accurate input values to get reliable conversion results
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Use the converted data to align legacy measurements with modern imaging and broadcast standards
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Be cautious when comparing values due to the units’ non-SI or largely obsolete status
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Verify conversions with additional references when precision is critical
Limitations
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Both stilb and millilambert are non-SI or largely outdated units, which limits direct equivalence to current standards
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Conversions may include rounding differences or subtle discrepancies
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Not suitable for applications requiring strict adherence to SI units without approximation
Frequently Asked Questions
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What does the stilb unit measure?
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The stilb (sb) measures luminance as luminous intensity emitted or reflected from a surface per unit area, defined in the CGS system.
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Why convert stilb to millilambert?
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Converting stilb to millilambert helps translate historical or legacy photometric data into units useful for cinematography, broadcast engineering, and modern imaging analysis.
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Are stilb and millilambert units still widely used?
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Both are largely obsolete or non-SI units but remain relevant in specific fields like imaging laboratories, cinematography, and when dealing with legacy data.
Key Terminology
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Stilb [sb]
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A CGS photometric unit of luminance equal to 10^4 candela per square metre, indicating luminous intensity per surface area.
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Millilambert [mL]
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A non-SI luminance unit equal to one thousandth of a lambert, used in imaging and cinematography to express luminous intensity per unit area into a solid angle.
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Luminance
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The measurement of luminous intensity emitted or reflected from a surface per unit area in a given direction.